Last year I got your drione dust and treated several holes in my soffit overhang and facia boards. I sealed them with wood filler good and tight so I know no moisture got inside. I also sprayed with cypermetrin and didn’t see anything till now. Then yesterday I saw a new hole. I don’t know how they drilled it so fast but it’s really deep. I figured I had better spray the area to stop new nests but as I went to start spraying, I could hear a buzzing sound and about a foot over there was another new hole being drilled but this bee was coming out of the wood and not going in? I watched it cut through the wood and then fly off somewhere. I can see some holes from last year are close by about a foot to the other side but I know I treated them good with drione so what’s happening? Are they nesting somewhere else I missed?

More on new bee holes in soffit